/**************************************************************************(C)*
 *
 *  This file is part of the GreenHills project
 *  Copyright (C) 2009  Tieto Corporation
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  Not for commmercial use. Only with Tieto permission.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *************************************************************************(C)*/

#pragma once

#include <QObject>
#include <QTime>

#include "gpsposition.h"
#include "gpsfix.h"

#include "gpsdll.h"

namespace greenhills {
namespace gps {

/** @brief NMEA sentences parser
 *
 * This component is responsible for parsing NMEA sentences. NMEA sentences are
 * handed over to this parser through onLineReceived slot. Appropriate signal is
 * emmited when NMEA sentence is sucessfully parsed.
 */
class GH_GPS_QT_CLASS CNMEAParser : public QObject
{
    Q_OBJECT;

public:
    /**
     * @brief Initializes the instance of CGPS object
     */
    CNMEAParser(QObject *pParent);

public Q_SLOTS:
    /**
     * @brief Slot for passing received NMEA sentences to parser.
     */
    void onLineReceived(const QString &pLine);

Q_SIGNALS:
    /**
     * @brief Slot is emitted when GGA sentence is received.
     */
    void GPGGAreceived(const QTime &pTime,
        const greenhills::gps::CGPSPosition &pPosition,
        const greenhills::gps::CGPSFix &pFix, int pSatelites, float pHdop,
        float pAltitude, float pGeoidHeight, float pDgpsUpdateDelay,
        int pDgpsStationId);

    /**
     * @brief Slot is emitted when VTG sentence is received.
     */
    void GPVTGreceived(float pHeadingTrueNorth, float pHeadingMagnetic,
        float pSpeedInKnots, float pSpeedInKilometers);

private:
    void onGPGGASentenceReceived(const QString &pLine);
    void onGPVTGSentenceReceived(const QString &pLine);

private:
    static CGPSCoordinate GPSCoordinateFromNMEA(
        float pValue, char pDirection, char pPosDirection, char pNegDirection);
    unsigned char checksum(const QString &pNmeaSentence);
};

} //namespace gps
} //namespace greenhills
